为迎接光伏电站平价上网的挑战,降低光伏发电的度电成本,提高光伏发电的经济性,光伏电站需要从提高能效和降低成本两方面着手。其中光伏电站不同的拓扑结构会影响电站能效和电站造价水平。参考实际运行的光伏电站案例以及设备的研究进展...为迎接光伏电站平价上网的挑战,降低光伏发电的度电成本,提高光伏发电的经济性,光伏电站需要从提高能效和降低成本两方面着手。其中光伏电站不同的拓扑结构会影响电站能效和电站造价水平。参考实际运行的光伏电站案例以及设备的研究进展,从技术性能和经济性2方面对4种不同拓扑结构进行定量的比较分析。此外,文中着重研究了DC-DC变换器成本变化对系统度电成本(levelized cost of energy,LCOE)的影响。研究结果表明,系统效率高的拓扑结构,并不一定是最经济的解决方案。各种拓扑结构选择要根据具体应用场景综合分析。研究结果对大型光伏电站设计有一定的参考意义。展开更多
Since June 2004, the State-Owned Assets Supervision & Administration Commission(SASAC) has launched pilot programs for a board of directors(BoD) for central SOEs to establish and improve their governance structure...Since June 2004, the State-Owned Assets Supervision & Administration Commission(SASAC) has launched pilot programs for a board of directors(BoD) for central SOEs to establish and improve their governance structure and standardize their exercise of shareholder rights over state-owned listed companies. Based on this quasinatural experiment, this paper examines the BoD's effects on the agency cost of state-owned listed companies and their economic consequences. Using data of central SOE-controlled companies listed at Shanghai and Shenzhen stock exchanges during 2002-2015, this paper finds that the pilot programs significantly reduced the two types of agency costs for the companies, and such effects primarily existed for listed companies with smaller central SOE shareholding ratios. Further test uncovers that, compared with central SOEs that did not carry out the pilot programs, those that did reported higher economic value-added and stock returns. Our conclusions offer a new interpretation of the BoD's governance effects from a controlling shareholder's perspective, and provide empirical evidence for the positive effects of the pilot programs for central SOE boards of directors. These findings have important policy implications for deepening SOE governance reforms.展开更多
文摘为迎接光伏电站平价上网的挑战,降低光伏发电的度电成本,提高光伏发电的经济性,光伏电站需要从提高能效和降低成本两方面着手。其中光伏电站不同的拓扑结构会影响电站能效和电站造价水平。参考实际运行的光伏电站案例以及设备的研究进展,从技术性能和经济性2方面对4种不同拓扑结构进行定量的比较分析。此外,文中着重研究了DC-DC变换器成本变化对系统度电成本(levelized cost of energy,LCOE)的影响。研究结果表明,系统效率高的拓扑结构,并不一定是最经济的解决方案。各种拓扑结构选择要根据具体应用场景综合分析。研究结果对大型光伏电站设计有一定的参考意义。
基金supported by the National Natural Science Foundation of China (NSFC) programs (71502161 and 71672134)Key Programs of Philosophical and Social Science Planning of Zhejiang Province (17NDJC025Z)+1 种基金Natural Science Foundation Program of Zhejiang Province (LQ14G020011)"Zhi Jiang Young Social Science Scholar" Program of Zhejiang Province (G267)
文摘Since June 2004, the State-Owned Assets Supervision & Administration Commission(SASAC) has launched pilot programs for a board of directors(BoD) for central SOEs to establish and improve their governance structure and standardize their exercise of shareholder rights over state-owned listed companies. Based on this quasinatural experiment, this paper examines the BoD's effects on the agency cost of state-owned listed companies and their economic consequences. Using data of central SOE-controlled companies listed at Shanghai and Shenzhen stock exchanges during 2002-2015, this paper finds that the pilot programs significantly reduced the two types of agency costs for the companies, and such effects primarily existed for listed companies with smaller central SOE shareholding ratios. Further test uncovers that, compared with central SOEs that did not carry out the pilot programs, those that did reported higher economic value-added and stock returns. Our conclusions offer a new interpretation of the BoD's governance effects from a controlling shareholder's perspective, and provide empirical evidence for the positive effects of the pilot programs for central SOE boards of directors. These findings have important policy implications for deepening SOE governance reforms.
